void main() {}

class Person {
  void run() {
    print("urn");
  }

  String aa;
}

class Student {
  int age;
}

class Person2 implements Person, Student {
  @override
  void go() {
    // TODO: implement go
  }

  @override
  String aa;

  @override
  void run() {
    // TODO: implement run
  }

  @override
  int age;
}
